I also fuel at Costco, will it hurt the engine if I only use 91 octane? I have a 2014 Hemi, and will be fueling today for the first timeWhile I'm driving a MY12, the specifications are the same. I run 87. The place I buy most of my gas (Costco) doesn't even sell 89. I've not had any performance issues and get good fuel economy.
Thanks!Hi,
no, the more octane the better the engine will run and the less it will consume
as the fuel efficiency is getting better.
so, your engine will say, thank you.
here we only have 91 to 100 octane gas in europe.
Completely and utterly false. The only way that would be true is if the timing can be advanced to take advantage of the increased octane, if the timing isn't increased you are not doing your engine any favors.Hi,
no, the more octane the better the engine will run and the less it will consume
as the fuel efficiency is getting better.
so, your engine will say, thank you.
here we only have 91 to 100 octane gas in europe.
I believe step one is the fact you are in Europe. If I remember right you guys measure octane different over there.maybe on your fusion it is not working, as it has a rubbish engine inside
but modern engines check automatically what kind of octane they get and know
how to handle.
and the v8 hemi is the same engine running in the usa and in europe.
here it is recommended to use them with 95 or 98 octane
and it will definetely need more gas when running with only 87 octane.
even nearly ALL high performance cars need to use 98 to 100 octance gas,
what do you think why ?!? ... as only with this gas the engines can get the
maximum power out of it.
and this is much better gas then to go with only 87.
it is like that. !!!
You do, and it is quite different.maybe we do measure it different .... but that huge difference. ?!?
... but thanks for the information, good to know.
but quite poor for an engine built in 2013 ... not having these standard features on board.
would be more easy if there would be one world standard at all![]()
Nope. Not at all. And it's a waste of money. Octane calculations are different here, too. We have typically 87, 89 and 91 derived by the specific formula used in North America.Hi,
no, the more octane the better the engine will run and the less it will consume
as the fuel efficiency is getting better.
so, your engine will say, thank you.
here we only have 91 to 100 octane gas in europe.
I dont think it is psychological. Compression Ratio has a huge impact on the otto efficiency of an engine. The compression ration doesnt change, but the advance of the spark is effectively a dynamic change to compression ratio and hence increases efficiency... Efficiency is a double edged sword in that more power normally makes the right foot put more of a grin on your dial... but that efficiency (all things being equal) will also give better economy. The knock sensors will advance the ignition in a vehicle like this and you will see economy increases... We get 91 standard octane, 95 and 98 octane in Oz. You do measure Octane via RON, dont you in the US?Slightly less hp are the implications. The vehicle is smart enough to sense that it has 87 in it, and will pulling timing back to compensate. This yields a slight (15ish?) loss in hp.
People will tell you that its better to use 89 long term for a variety of (mostly bogus) reasons. Keep in mind, the Hemi is also a work truck engine, and can run for hundreds of thousands of miles on 87.
Sometimes I feel like I get slightly better fuel economy using 89. It may be a psychological thing though.